Correcting device for anchoring angle of pre-stressed anchor cable

Abstract

The device comprises a steel pipe, the steel pipe is located in an anchor cable drill hole, a plurality of short pipes are arranged at the starting end of the steel pipe and communicate with the steel pipe, steel plates are further arranged on the outer surface of the steel pipe and located on the inner sides of the short pipes, and the short pipes are symmetrically distributed along the center line of the steel plates. The device has the beneficial effects that the tail end of the steel pipe is arranged to be in the wedge shape, so that the steel pipe is conveniently embedded in the anchor cable drill hole, the steel pipe is arranged on the outer side of the anchor cable in a sleeving mode, the axis of the anchor cable coincides with the axis of the steel pipe, the anchor cable cannot generate angle deflection after penetrating out of the steel pipe, and it is guaranteed that the axial tensioning force cannot be reduced when applied.

Description

Technical Field

[0001] The invention relates to the technical field of slope protection engineering, in particular to a correction device for the anchoring angle of a prestressed anchor cable. Background Art

[0002] Prestressed anchor cable is a measure to increase the stability of retaining structures or rock and soil by anchoring. The principle is to pass the steel strand through a sliding surface that may slide or has already slid, fix one end of the steel strand in a stable rock and soil, tension the steel strand to apply prestress, and then fix the other end of the steel strand to the surface of the rock and soil or retaining structure. The prestress applied on the steel strand is used to reduce the deformation of the retaining structure or limit the sliding of the rock and soil, thereby improving the stability of the rock and soil or retaining structure.

[0003] Prestressed anchor cables are often used in conjunction with anchor piles, frame beams, etc. When constructing frame beams or anchor piles, it is generally necessary to pre-embed a 100mm diameter PVC pipe in the structure so that the anchor cable can freely expand and contract in the frame beam or anchor pile. The anchor cable drilling diameter is generally 115mm or 130mm. The PVC pipe diameter is smaller than the drilling diameter, which causes the PVC pipe to tilt in the drilling hole when pre-embedded. The PVC pipe axis does not coincide with the drilling axis. At this time, tension is applied according to the designed tension force, and the tension transmitted to the axial direction of the anchor cable will be reduced, making it difficult for the prestress applied to the anchor cable to meet the design requirements, weakening the engineering function of the anchor cable.

[0004] After pouring the anchor cable pier, additional grouting is required in the PVC pipe. Due to the inclination of the anchor cable drilling hole, the cement mortar will flow out of the drilling hole under the action of gravity during the additional grouting, resulting in incomplete grouting in the drilling hole. The free section of the anchor cable is prone to rust in the air, which weakens the engineering durability of the anchor cable. When pouring the anchor cable pier for anchor tensioning, it is often the case that the angle between the pier and the anchor cable is not completely perpendicular, which will also cause the tension force transmitted to the axial direction of the anchor cable to be reduced, weakening the engineering function of the anchor cable. In order to solve the problem of the angle of the anchor cable pier, there are now prefabricated pier templates with adjustable angles, but the angle of the template is manually adjusted. Affected by the quality of on-site construction, it is difficult for the pier angle to be strictly perpendicular to the anchor cable drilling hole, affecting the reinforcement effect. Summary of the invention

[0005] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a correction device for the anchoring angle of a prestressed anchor cable.

[0006] The objective of the present invention is achieved through the following technical scheme: a correction device for the anchoring angle of a prestressed anchor cable, comprising a steel pipe, the steel pipe being located in a drilled hole of the anchor cable, a plurality of short tubes being arranged at the starting end of the steel pipe, and the short tubes being connected to the steel pipe, a steel plate being also arranged on the outer surface of the steel pipe, and the steel plate being located on the inner side of the short tubes, and the short tubes being symmetrically distributed along the center line of the steel plate.

[0007] Preferably, the end of the steel pipe is wedge-shaped.

[0008] Preferably, the steel plate is perpendicular to the axis of the steel pipe.

[0009] Preferably, the diameter of the steel pipe is smaller than the diameter of the anchor cable drill hole.

[0010] Preferably, there are two short tubes, and the height of the upper end openings of the short tubes is higher than the upper end surface of the steel plate.

[0011] The present invention has the following advantages:

[0012] 1. The present invention sets the end of the steel pipe into a wedge shape, thereby burying the steel pipe in the anchor cable drill hole, and sleeves the steel pipe on the outside of the anchor cable so that the axis of the anchor cable coincides with the axis of the steel pipe. In this way, the anchor cable will not produce an angular deflection after passing through the steel pipe, thereby ensuring that the axial tension force will not be reduced when applied.

[0013] 2. The present invention welds a steel plate on the outside of a steel pipe to use it as reinforcement for the pier, thereby increasing the local compressive bearing capacity of the pier, and at the same time makes the steel plate perpendicular to the axis of the steel pipe, so that the surface of the pier is perpendicular to the axis of the steel pipe, and then the surface of the pier is perpendicular to the anchor cable, further avoiding reduction when axial tension is applied, avoiding insufficient tension during the tensioning process of the anchor cable, improving the construction quality of the anchor cable, and improving construction efficiency.

[0014] 3. The present invention provides a short tube at the starting end of the steel tube, and the short tube is connected to the steel tube. After the anchor cable is tensioned and locked, any short tube is used as a grouting hole for grouting. When the slurry overflows from the pipe mouth of the other short tube, it means that the grouting is full, thereby isolating the anchor cable from the erosion of the environmental soil and environmental water, thereby improving the durability of the anchor cable.

[0015] 4. The present invention makes it easier to connect the short pipe with the grouting pipe by making the upper end of the short pipe higher than the upper end surface of the steel plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic diagram of the structure of the correction device;

[0017] Figure 2 It is a schematic diagram of the structure of AA section view;

[0018] Figure 3 It is a structural schematic diagram of the positional relationship between the correction device, the frame beam and the anchor cable drilling hole;

[0019] In the figure, 1-steel pipe, 2-steel plate, 3-short pipe, 4-frame beam, 5-longitudinal reinforcement of frame beam, 6-anchor cable drilling hole, 7-pad, 8-pad, 9-anchor. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0021] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features of the embodiments may be combined with each other.

[0023] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0024] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the product of the invention is usually placed when in use, or the positions or positional relationships commonly understood by those skilled in the art, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0025] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0026] In this embodiment, the direction where the end of the steel pipe 1 is located is defined as the inner side. Figure 1 and Figure 2As shown, a correction device for the anchoring angle of a prestressed anchor cable comprises a steel pipe 1, the steel pipe 1 is located in the anchor cable borehole 6, a plurality of short tubes 3 are provided at the starting end of the steel pipe 1, and the short tubes 3 are connected to the steel pipe 1, and further, the end of the steel pipe 1 is wedge-shaped. Specifically, the end of the steel pipe 1 is set to be wedge-shaped, so that it is convenient for the steel pipe 1 to be buried in the anchor cable borehole 6, and the steel pipe 1 is sleeved on the outside of the anchor cable so that the axis of the anchor cable coincides with the axis of the steel pipe 1, so that the anchor cable will not produce an angle deflection after passing through the steel pipe 1, thereby ensuring that the axial tension force will not be reduced when applied. A steel plate 2 is also provided on the outer surface of the steel pipe 1, and the steel plate 2 is located on the inner side of the short tubes 3, and the short tubes 3 are symmetrically distributed along the center line of the steel plate 2. Preferably, the steel plate 2 is perpendicular to the axis of the steel pipe 1. Specifically, by welding the steel plate 2 on the outside of the steel pipe 1, it is used as the reinforcement of the cushion 7, thereby increasing the local compressive bearing capacity of the cushion 7, and at the same time making the steel plate 2 perpendicular to the axis of the steel pipe 1, so that the surface of the cushion 7 is perpendicular to the axis of the steel pipe 1, and then the surface of the cushion 7 is perpendicular to the anchor cable, further avoiding the reduction when the axial tension force is applied, avoiding insufficient tension force during the tensioning process of the anchor cable, improving the construction quality of the anchor cable, and improving the construction efficiency.

[0027] In this embodiment, the diameter of the steel pipe 1 is smaller than the diameter of the anchor cable drilling hole 6. Specifically, the diameter of the steel pipe 1 is slightly smaller than the diameter of the anchor cable drilling hole 6, so that when the steel pipe 1 is buried in the anchor cable drilling hole 6, the gap between the steel pipe 1 and the inner wall of the anchor cable drilling hole 6 is very small, thereby ensuring that the steel pipe 1 does not shake.

[0028] Furthermore, there are two short tubes 3, and the height of the upper end of the short tube 3 is higher than the upper end surface of the steel plate 2. Specifically, by arranging the short tube 3 at the starting end of the steel pipe 1, and the short tube 3 is connected with the steel pipe 1, when the anchor cable is tensioned and locked, any short tube 3 is used as a grouting hole for grouting. When the slurry overflows from the mouth of the other short tube 3, it means that the grouting is full, thereby isolating the environmental soil and environmental water from erosion of the anchor cable, and improving the durability of the anchor cable; at the same time, the height of the upper end of the short tube 3 is higher than the upper end surface of the steel plate 2, so as to facilitate the connection of the short tube 3 with the grouting pipe.

[0029] The construction process of the present invention is as follows: Figure 3As shown, first, during the process of tying the longitudinal reinforcement 5 and other stirrups on the frame beam 4, the end of the steel pipe 1 is inserted into the anchor cable drilling hole 6, so that the anchor cable is located in the anchor cable drilling hole 6, and then the frame beam 4 and the cushion pier 7 are supported and cast together, the steel plate 2 and the middle part of the short tube 3 are located in the cushion pier 7, but the upper end of the short tube 3 is located outside the cushion pier 7. After the casting is completed, the templates of the frame beam 4 and the cushion pier 7 are removed, and the anchor cable is tensioned and locked by the pad 8 and the anchor 9. When the anchor cable is tensioned and locked, the grouting pipe is put into any short tube 3 as a grouting hole for grouting. When the slurry overflows from the pipe mouth of the other short tube 3, it means that the grouting is full, thereby isolating the environmental soil and environmental water from eroding the anchor cable, thereby improving the durability of the anchor cable. After the anchor cable is tested and qualified, the anchor can be sealed to complete the construction of the anchor cable.

[0030] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A device for correcting the anchoring angle of a prestressed anchor cable, characterized in that: The invention comprises a steel pipe (1), wherein the steel pipe (1) is located in an anchor cable borehole (6), a plurality of short pipes (3) are arranged at the starting end of the steel pipe (1), and the short pipes (3) are connected to the steel pipe (1), a steel plate (2) is also arranged on the outer surface of the steel pipe (1), and the steel plate (2) is located on the inner side of the short pipes (3), and the short pipes (3) are symmetrically distributed along the center line of the steel plate (2).

2. The device for correcting the anchoring angle of a prestressed anchor cable according to claim 1, characterized in that: The end of the steel pipe (1) is wedge-shaped.

3. The device for correcting the anchoring angle of a prestressed anchor cable according to claim 2, characterized in that: The steel plate (2) is perpendicular to the axis of the steel pipe (1).

4. The device for correcting the anchoring angle of a prestressed anchor cable according to claim 3 is characterized in that: The diameter of the steel pipe (1) is smaller than the diameter of the anchor cable drilling hole (6).

5. The device for correcting the anchoring angle of a prestressed anchor cable according to claim 4, characterized in that: There are two short tubes (3), and the height of the upper end openings of the short tubes (3) is higher than the upper end surface of the steel plate (2).

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